JPH06142043A - Subjective optometric apparatus - Google Patents

Abstract

PURPOSE:To obtain a subjective optometric apparatus where observation range of expression of a subject to be examined is large and both the range of the distance between pupils and the range of the effective range of view can be sufficiently ensured by positioning each of lens plates for left and right eyes at an overlapping condition while there exists a space where each rotational region is secured. CONSTITUTION:A subjective optometry apparatus 1 is provided with an optometric table 2, an optometric means 6 and an operational means 7. In the optometric means 6, a pair of axes 12a and 12b are positioned along the view axis direction of a subject to be examined and at a definite distance in a main body 11 and each three lens sheet plates 13a to 15a and 13b to 15b for left and right eyes EL and ER and having teeth on their outer periphery are positioned on each of axes 12a and 12b under an alternatively overlapping condition while having a space where a part of each rotational region is secured. Major part of the face of the subject to be examined can be exposed, thereby, below this optometry means and the range of observation of expression of the subject to be examined is large and the range of the effective range of view can be sufficiently ensured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subjective eye examination apparatus, and more specifically, a plurality of lens plates for the left and right eyes are coaxially arranged, and a large number of lenses for the subjective eye examination are provided on each lens plate. The present invention relates to a subjective optometry apparatus having optometry means arranged in a line in a circle.

[0002]

2. Description of the Related Art In this type of subjective optometry apparatus, a maximum pledged structure of a range of an interpupillary distance and an effective visual field of a subject and a request to observe the facial expression of the subject as much as possible is adopted. It is customary to do so.

An outline of a conventional subjective optometry apparatus will be described below.

An optometry means 50 of the subjective optometry apparatus shown in FIG.
Is inside the box-shaped main body 51 along the visual axis direction of the subject,
And, a pair of shafts 52a, 52b are arranged at a constant interval,
A plurality of lens plates for the left and right eyes (each shown in FIG. 9) 53a, 53b are rotatably attached to the respective shafts 52a, 52b. On the lens plates 53a and 53b, a required number of lenses 54a and 54b having different frequencies are arranged in a circular arrangement.

Then, the subjective eye examination is performed by setting the distance between the centers of the left and right lenses 54a, 54b located below the line connecting the pair of axes 52a, 52b to the interpupillary distance PD of the subject. It is like this.

In the case of this optometry means 50, a pair of shafts 52
The distance between the centers of the left and right lenses 54a and 54b located below the line connecting a and 52b is the interpupillary distance P of the subject.
Since it is set to D, the nose part of the subject is located just around the concave portion 55 provided in the lower central portion of the device main body 31, and as a result, the upper half of the face of the subject Is hidden by the apparatus main body 51, and there is a problem that it is not possible to sufficiently deal with the request to observe the facial expression of the subject as much as possible.

[0007] In order to deal with the request to observe the facial expression of the subject, a subjective eye examination unit 60 having the structure shown in Fig. 10 is also conceivable.

The optometry means 60 comprises a pair of shafts 62a, 6a.
The distance of 2b is close to each other within a range where the lens plates 63a and 63b do not overlap. In the case of this subjective optometry apparatus 60, each lens plate 63a, 63b has one
If the two lenses 64a and 64b having a diameter of about 20 mm are arranged in a circle and the distance between the lowermost lenses 64a and 64b can be set to the interpupillary distance PD by setting the effective visual field to about 35 degrees, the subjective optometry apparatus As compared with the case of 50, the position of the nose part of the subject is lowered, so that a considerable part of the face of the subject can be observed.

However, in the case of this optometry means 60,
Actually, the arrangement radius r of the lenses 64a and 64b is 39 mm.
As described above, the radius R of each lens plate 63a, 63b becomes 49 mm or more, the distance between the lenses 64a, 64b becomes 98 mm at the minimum, and the inter-pupil distance PD of the subject is PD = 5.
There is a problem in that the range of 0 to 80 mm is greatly exceeded and it is not practical.

[0010]

As described above, in the case of the conventional subjective optometry apparatus, it is not possible to sufficiently cope with the request to observe the facial expression of the subject as much as possible, or it is impossible to put it into practical use. There is a problem.

Therefore, an object of the present invention is to provide a subjective optometry apparatus which has an improved structure, has a large observation range of the subject's facial expression, and can sufficiently secure the range of the interpupillary distance and the range of the effective visual field. It is what

[0012]

SUMMARY OF THE INVENTION According to the present invention, a plurality of lens plates for the left and right eyes are coaxially arranged, and each lens plate for the left eye and each lens plate for the right eye are coaxially arranged. The interval is adjustable according to the interpupillary distance of the examinee.In the subjective optometry apparatus having optometric means in which a large number of lenses for subjective optometry are arranged in a circle in each lens plate, each of the left and right eyes The lens plates are arranged in an overlapping state while having a space for ensuring each rotation region, and the respective lenses are provided for the subjective eye examination.

[0013]

According to the optometric means of the subjective optometry apparatus having the above-described structure, the left and right sides, each of which has a large number of lenses for the subjective optometry arranged in a circle, are adjustable in accordance with the interpupillary distance of the subject. Since each lens plate for the eye is arranged in an overlapping state while having a space for ensuring each rotation region, each lens located at the bottom of each lens plate is used for subjective optometry. By setting the distance between the lenses located at the bottom of the lens plate to the interpupillary distance,
Most of the face of the subject can be exposed below the optometry means, and the observation range of the subject's facial expression is large, and the range of the effective visual field can be sufficiently secured.

[0014]

EXAMPLES Examples of the present invention will be described in detail below.

The subjective optometry apparatus 1 shown in FIG. 1 is a conscious type that is displaceably supported by an optometry table 2 arranged horizontally on a base 3 and a supporting member 5 mounted on the optometry table 2. An optometry means 6 for performing an optometry of an examiner, and an operation means 7 provided with a ten-key pad arranged on the optometry table 2, an optotype switching key, a display unit and the like are provided.

Now, the optometry means 6 will be described in detail with reference to FIGS.

The optometric means 6 has a pair of shafts 12a and 12b arranged in the box-shaped main body 11 along the visual axis direction of the subject and at a constant interval. Lens plates 13a to 15a, 13b to 15b having three teeth on the outer circumference for the left and right eyes EL and ER are arranged in an alternately overlapping state with a space for securing a part of each rotation region. There is.

One end (subject side) of the pair of shafts 12a, 12b has a pair of bearing portions 16a, 16 provided in the main body 11.
It is movably supported in the horizontal direction by the elongated hole of b.

A space adjusting mechanism 17 is provided at the other end of the pair of shafts 12a and 12b.

The gap adjusting mechanism 17 is a rotary screw provided with screws in different directions on the shaft 12a side and the shaft 12b side, which are rotatably supported by a pair of supporting members 18a and 18b mounted inside the rear surface of the main body 11. Body 19 and axes 12a, 1
2b, and a pair of slide bodies 20a, 20b screwed onto the rotary screw body 19 so that the rotary screw body 19 penetrates respectively, and a driven gear 21 attached to the end of the rotary screw body 19, The main body 11 is provided with a gap adjusting motor 22 and a driving gear 23 mounted on a driving shaft of the spacing adjusting motor 22 and screwed into a driven gear 21.

In the main body 11, as shown in FIG.
A pair of left and right viewing holes 24a, 24 having the same front and back shapes
b is provided.

As shown in FIG. 4, each of the lens plates 13a to 15a and 13b to 15b has a lens 25a, which has a different diopter (a spherical lens, a cylindrical lens, an auxiliary lens).
Twelve 25b are arranged in a line in a circular arrangement.
Then, the lens plate 13a is rotated by a rotation driving means (not shown).
To 15a and 13b to 15b are individually driven to rotate,
As shown in FIGS. 3 and 4, the lowermost lenses 25a and 25b facing the viewing windows 24a and 24b are arranged to face the eyes EL and ER to be inspected.

In the case of the optometry means 6 having the above-described structure, the lens plates 13a to 15a and the lens plates 13b to 15b are alternately superposed, so that when a subject observes an unillustrated optotype, it is shown in FIG. The left and right eye to be examined EL, E
An optical path difference X occurs for R.

Therefore, an optical path length correction member (plane parallel mirror) 26 may be inserted in front of the lens plate 13a to correct the optical path difference X.

FIG. 7 shows a control system of the subjective optometry apparatus 1, in which a program memory 32 storing an operation program, a control section 31, and various operation signals from the operation means 7 are wirelessly fetched. Interface 33
The control unit 30 includes a control unit 30, and the control unit 31 includes the distance adjusting motor 22, the lens plates 13a to 15a,
A rotation driving means 34 using a motor and gears for individually rotating 13b to 15b is connected.

Next, the operation of the subjective optometry apparatus 1 will be described mainly with the operation of the optometry means 6 and with reference to FIG.

When the subject's subjective eye examination is performed by using the eye examination means 6, the respective lens plates 13a to 15a and 13b to 15b are individually and rotationally driven by the rotation driving means 34, and the viewing windows 24a and 24b are obtained. The respective lenses 25a, 25b of a predetermined dioptric power facing the eye are made to face the eyes EL, ER to be inspected.

At this time, the rotation of the space adjusting motor 22 of the space adjusting mechanism 17 is controlled by the control unit 31, and the rotational force of the space adjusting motor 22 is controlled by the driving gear 23 and the driven gear 2.
1 is transmitted to the rotary screw body 17 and the slide body 20
a, 20b and the shafts 12a, 12b are displaced in the direction of the arrow shown in FIG. 2 to adjust the distance between the shafts 12a, 12b, so that the lowermost lens 25 facing the viewing windows 24a, 24b.
The distance between a and 25b is set to the inter-pupil distance PD of the subject.

As a result, as shown in FIG. 6, most of the subject's face can be exposed below the optometric means 6, and the subject's facial expression can be observed while giving the subject a feeling of liberation. Can be sufficiently secured, and the distance between the lenses 25a and 25b can be adjusted according to the inter-pupil distance PD of the subject, so that various subjects can be easily accommodated.

Further, in the case of the above-described optometry device 6, since the lens plates 13a to 15a and the lens plates 13b to 15b are alternately superposed, the diameters of these lenses and the lenses 25a and 25b are the same as those in the conventional example. When I did
Lens plates 13a to 15a, lens plates 13b to 15b
There is also an advantage that the lateral width dimension of the optometry means 6 can be reduced by the amount of overlapping.

On the contrary, when the size of the main body 11 is substantially the same as that of the conventional example, the lens plates 13a to 15a and the lens plate 13 are formed.
The lens plates 13a to 15a and the lens plates 13b to 15b are formed by alternately stacking b to 15b.
The diameter of the lens 25 to be mounted is larger than that of the conventional example
By increasing the number of a and 25b, it is possible to use three lens plates for the left and right eyes in the related art, but it is also possible to use a structure of two lens plates each. There is also an advantage that can be reduced.

FIG. 8 shows another optometry means 6 in this embodiment.
It shows A.

The optometry means 6A has the same structure as the optometry means 6 in principle, but includes a left eye unit 41a,
The right eye unit 41b and the lens plates 43a and 44a,
The lens plates 43b and 44b are rotatably incorporated in an arrangement in which they can be alternately stacked, and the left eye unit 41a and the right eye unit 41b are arranged by a distance adjusting mechanism section 17A having the same configuration as the distance adjusting mechanism section 17 described above. The distance between the lowermost lenses 45a and 45b facing the viewing windows 46a and 46b is made to correspond to the inter-pupil distance PD of the subject by adjusting the approaching or leaving.

Even if this optometry means 6A is used, the same operational effect as in the above case can be exhibited.

The present invention is not limited to the above-mentioned embodiments, but various modifications can be made within the scope of the invention.

[0036]

According to the present invention described in detail above, since it is configured as described above, most of the face of the subject can be exposed below the optometric means, and the facial expression of the subject can be expressed. It is possible to provide a subjective optometry apparatus that has a large observation range, can secure a sufficient range of an effective visual field, and can easily deal with various subjects.

[Brief description of drawings]

FIG. 1 is a perspective view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an optometry unit in an apparatus according to an embodiment of the present invention.

FIG. 3 is a front view of the optometry means in the apparatus according to the embodiment of the present invention.

FIG. 4 is a perspective view showing an arrangement of lens plates of the optometry means in the apparatus of the present invention.

FIG. 5 is an explanatory view showing an arrangement of lenses used for a subjective test of the optometry means in the apparatus of the embodiment of the present invention.

FIG. 6 is an explanatory diagram of an optometry state using optometry means in the apparatus according to the embodiment of the present invention.

FIG. 7 is a block diagram showing a control system of an apparatus according to an embodiment of the present invention.

FIG. 8 is a perspective view of another optometry unit in the apparatus according to the embodiment of the present invention.

FIG. 9 is a schematic view of a conventional optometry means.

FIG. 10 is a schematic view of another conventional optometry means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Subjective optometry apparatus 6 Optometry means 11 Main body 12a, 12b Axis 13a, 13b Lens plate 17 Interval adjustment mechanism part 25a, 25b Lens

Claims (1)

[Claims] 1. A plurality of lens plates for the left and right eyes are coaxially arranged, and a distance between each lens plate for the left eye and each lens plate for the right eye in the coaxial arrangement is between pupils of a subject. In the subjective optometry apparatus having optometric means in which a large number of lenses for subjective optometry are arranged in a circle in each lens plate that can be adjusted according to the distance, each lens plate for the left and right eyes, each rotation region The subjective optometry apparatus having a configuration in which the lenses are arranged in an overlapping state while having a space for ensuring the above, and each of the lenses is provided for the subjective optometry.